How to query nodes whichs childs fullfil some conditio

Hy,


how could I  get all <model> nodes, that have a <competitor> node inside them and its @id value must be "325d".
         <data>
         
            <model id="CLK 320 CDI Coupi">
              <competitors>
                 <competitor id="325d"/>
              </competitors>
           </model>
           <model id="CLK 320 CDI Coupi">
              <competitors>
                 <competitor id="335d"/>
              </competitors>
           </model>
           
         </data>
         
Best regards,

Robert
-- 
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